CN108026894A - Inclined shaft type hydraulic pump motor - Google Patents
Inclined shaft type hydraulic pump motor Download PDFInfo
- Publication number
- CN108026894A CN108026894A CN201580083120.5A CN201580083120A CN108026894A CN 108026894 A CN108026894 A CN 108026894A CN 201580083120 A CN201580083120 A CN 201580083120A CN 108026894 A CN108026894 A CN 108026894A
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- China
- Prior art keywords
- center
- axis
- axle center
- cylinder block
- transmission shaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
- F04B1/24—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
- F03C1/0642—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined on main shaft axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
- F16D3/2245—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere where the groove centres are offset from the joint centre
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/24—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts comprising balls, rollers, or the like between overlapping driving faces, e.g. cogs, on both coupling parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0076—Connection between cylinder barrel and inclined swash plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D2003/22303—Details of ball cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D2003/22309—Details of grooves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/10—Surface characteristics; Details related to material surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
With by cylinder block（30）Central shaft（80）Tiltably it is supported on transmission shaft（20）End face return plate（70）And with the constant velocity cardan joint that will be connected between central shaft and return plate（100）Inclined shaft type hydraulic pump motor in, in order to make the rotation high speed of cylinder block, so that each sphere by being arranged at constant velocity cardan joint（103）It is applied to retainer（104）The balancing the load on axis direction mode, make comprising being arranged at the cylinder body side ball groove of central shaft（102）Extension axis and vert center（XC）Cylinder body side channel plane（102P）All relative to the axle center of central shaft（80C）Tilt, and make comprising the axis side ball groove for being arranged at return plate（101）Extension axis and vert center（XC）Transmission shaft side channel plane（101P）All relative to the axle center of transmission shaft（20C）Tilt.
Description
Technical field
The present invention relates to a kind of inclined shaft type hydraulic pump motor.
Background technology
Change work relative to the angle of inclination (tilt angle) in the axle center of transmission shaft in the axle center by varying cylinder block
, can be in cylinder block and the return plate (Retainer of transmission shaft in the inclined shaft type hydraulic pump motor of the stroke distance of stopper rod
Plate it is attached between) by constant velocity cardan joint, as the construction for making cylinder block and transmission shaft synchronous rotary.Constant speed
Universal joint for example, cylinder block one end set in spherical interior side engagement portion with return plate set become outer side joint
Between the cylindric recess in conjunction portion, multiple spheres kept by retainer are arranged, by making sphere be in interior side engagement portion
It will be connected between the ball groove of ball groove and outer side engagement portion between cylinder block and return plate.
In order to form constant velocity cardan joint between cylinder block and return plate, it is necessary to which all spheres are configured relative to gas
The tilt angle of cylinder body and transmission shaft is located at the position of bisecting plane.Therefore, be set as in the past, relative to cylinder block axle center with
The intersection point (center of verting) in the axle center of transmission shaft, makes the center of retainer and the sliding contact surface of interior side engagement portion and keeps
The center of the sliding contact surface of device and return plate, deviates, by making to act on round about along the axis direction of transmission shaft
The balancing the load of retainer, (for example, ginseng on the bisecting plane for the tilt angle that retainer is maintained to cylinder block and transmission shaft
See patent document 1).
However, make retainer with the center of cylinder block and the sliding contact surface of return plate relative to cylinder block and transmission shaft
Off-centring of verting technical solution in, unnecessary turning moment is had when cylinder block rotates and acts on cylinder block.Its
As a result, relative to valve plate (Valve Plate) position offset may occur for cylinder block.
In addition, in the structure of patent document 1, due to betiding the couple of retainer, retainer quilt when transmitting moment of torsion
It is pressed against on return plate and sliding contact surface can generate heat, therefore high speed can be hindered.
On the other hand, there is provided have such constant velocity cardan joint：With the extension axis comprising respective ball groove and center of verting
Plane forms the ball groove of the ball groove of outer side engagement portion and interior side engagement portion relative to the inclined mode in axle center.According to such etc.
Fast universal joint, can make to act on balance of the load of retainer on axis direction by sphere, therefore need not make two components
The center of respective sliding contact surface can also maintain retainer positioned at two relative to the off-centring of verting of two components
(for example, with reference to patent document 2) on position on the bisecting plane of the tilt angle of a component.
Patent document 1：Japanese Unexamined Patent Publication 2001-241376 publications
Patent document 2：Japanese Unexamined Patent Publication 2009-250365 publications
The content of the invention
In addition, in inclined shaft type hydraulic pump motor, the pulsation of pressure in order to prevent is usually more to set the number of piston rod
For odd number.Also, in order to prevent fluctuation in the moment of torsion transmission between cylinder block and transmission shaft, it is necessary to make in cylinder block with returning
The number of sphere between journey disk is consistent with the number of piston rod.
As patent document 2 is recorded, in general constant velocity cardan joint, the number of sphere be set as 6 or 8 this
The even number of sample.Therefore, if the inclined shaft type hydraulic pump motor that the number applied to piston rod is 7, makes comprising on the inside of being arranged at
The plane at the extension axis of the ball groove at junction surface and center of verting and include the outrigger shaft of the ball groove for being arranged at outer side engagement portion
Line and the plane at center of verting, being respectively relative to the axle center of cylinder block respectively has 6 inclination, then need not make retainer and cylinder block and
The center of the sliding contact surface of return plate, also should be able to inclining retainer relative to cylinder block and the off-centring of verting of transmission shaft
The tilt angle that gyration maintains for cylinder block and transmission shaft is located on the position of bisecting plane.
However, actual conditions are, even in making the extension axis comprising the ball groove for being arranged at interior side engagement portion and verting
The plane of the heart and extension axis and the plane at center of verting comprising the ball groove for being arranged at outer side engagement portion, have 6 to incline respectively
Tiltedly, retainer still can generate heat with the sliding contact surface of interior side engagement portion or outer side engagement portion, it is difficult to high speed.
The present invention is in view of above-mentioned actual conditions, and its purpose is to provide a kind of the oblique of rotation high speed that can make cylinder block
Shaft type hydraulic pump motor.
In order to achieve the above objectives, inclined shaft type hydraulic pump motor of the present invention, it is that have：Cylinder block, it is one
The position in the axle center in square end face has central shaft, and in the circumference upper shed of the one side end face centered on above-mentioned axle center
There is odd number cylinder bore；Return plate, above-mentioned central shaft is tiltably supported on the end face of transmission shaft by it；And constant velocity universal
Section, it will be connected between above-mentioned central shaft and above-mentioned return plate, by above-mentioned constant velocity cardan joint, above-mentioned transmission shaft and above-mentioned cylinder
When body is rotated centered on respective axle center, the piston rod of above-mentioned cylinder bore is disposed according to above-mentioned transmission shaft and above-mentioned cylinder block
The inclined shaft type hydraulic pump motor of stroke movement is carried out around the angle of inclination at center of verting, wherein, above-mentioned constant velocity cardan joint has：It is interior
Side engagement portion, it is formed at the supporting end of above-mentioned central shaft, in outer surface along centered on the axle center of above-mentioned central shaft
The cylinder body side ball groove of number corresponding with above-mentioned cylinder bore is circumferentially arranged side by side；Outer side engagement portion, it is formed at above-mentioned return plate
In the position opposite with the supporting end of above-mentioned central shaft, in inner surface along the circumferential direction centered on the axle center of above-mentioned transmission shaft
Axis side ball groove corresponding with above-mentioned cylinder body side ball groove has been arranged side by side；Sphere, its have it is multiple, in the cylinder body to correspond to each other
Between side ball groove and axis side ball groove, and moment of torsion is transmitted between above-mentioned cylinder block and above-mentioned return plate；And retainer, its
It is disposed between above-mentioned interior side engagement portion and above-mentioned outer side engagement portion, has to limit axis of the above-mentioned sphere along above-mentioned central shaft
The state of the movement in heart direction stores the ball of each sphere；Wherein, so as to be applied to above-mentioned retainer by each above-mentioned sphere
The balancing the load on axis direction mode, make the extension axis comprising above-mentioned cylinder body side ball groove and above-mentioned center of verting
Cylinder body side channel plane is all tilted relative to the axle center of above-mentioned central shaft, and make the extension axis comprising above-mentioned axis side ball groove with it is upper
The transmission shaft side channel plane for stating center of verting all is tilted relative to the axle center of transmission shaft.
In addition, of the invention in above-mentioned inclined shaft type hydraulic pump motor, above-mentioned cylinder body side channel plane and above-mentioned transmission shaft side channel
Plane is in addition to 1 group, and adjacent both are respectively relative to axle center in opposite direction inclination in the circumferential, also, the cylinder to correspond to each other
Side groove plane is tilted with transmission shaft side channel plane relative to axle center in opposite direction.
In addition, of the invention in above-mentioned inclined shaft type hydraulic pump motor, above-mentioned cylinder body side channel plane and above-mentioned transmission shaft side channel
Plane be equal to each other relative to angle of inclination of the axle center to the inclined plane in side and relative to axle center to opposite side tilt
The mode that is equal to each other of angle of inclination of plane formed.
In addition, the present invention is in above-mentioned inclined shaft type hydraulic pump motor, the outer surface of above-mentioned interior side engagement portion and above-mentioned outer
The inner surface of side engagement portion is respectively structured as spherical centered on above-mentioned center of verting, and makes the song of above-mentioned cylinder body side ball groove
The center of curvature of rate center and above-mentioned axis side ball groove is consistent with above-mentioned center of verting.
In addition, the present invention, in above-mentioned inclined shaft type hydraulic pump motor, above-mentioned central shaft and above-mentioned cylinder block are separately formed, and
And above-mentioned central shaft is pacified from the state that one side end face protrudes with supporting end formed with shaft mounting hole in above-mentioned cylinder block
In above-mentioned shaft mounting hole.
In addition, the present invention has in above-mentioned inclined shaft type hydraulic pump motor：Valve plate, it is in the another of above-mentioned cylinder block
Between square end face and housing, relative to above-mentioned cylinder block rotatably with its sliding contact, thus according to the rotation of above-mentioned cylinder block
The switching control for carrying out the pressure to each above-mentioned cylinder bore is put in indexing；Wherein, above-mentioned valve plate passes through in the axle center of above-mentioned cylinder block
There is the sphere at center on extended line, abutted with above-mentioned the opposing party end face.
In addition, inclined shaft type hydraulic pump motor of the present invention, it is that have：Cylinder block, it is in the axle center in a square end face
Position there is central shaft, and the circumference upper shed in the one side end face centered on above-mentioned axle center has odd number cylinder
Thorax；Return plate, above-mentioned central shaft is tiltably supported on the end face of transmission shaft by it；And constant velocity cardan joint, it will be above-mentioned
Connected between central shaft and above-mentioned return plate, by above-mentioned constant velocity cardan joint, above-mentioned transmission shaft and above-mentioned cylinder block are with respective
When being rotated centered on axle center, the piston rod of above-mentioned cylinder bore is disposed according to above-mentioned transmission shaft and above-mentioned cylinder block around center of verting
Angle of inclination carry out stroke movement inclined shaft type hydraulic pump motor, wherein, above-mentioned constant velocity cardan joint has：Interior side engagement portion,
It is formed at the supporting end of above-mentioned central shaft, is set side by side along the circumferential direction centered on the axle center of above-mentioned central shaft in outer surface
It is equipped with the cylinder body side ball groove of number corresponding with above-mentioned cylinder bore；Outer side engagement portion, its be formed in above-mentioned return plate with it is above-mentioned in
The opposite position of the supporting end of mandrel, has been arranged side by side in inner surface along the circumferential direction centered on the axle center of above-mentioned transmission shaft
Axis side ball groove corresponding with above-mentioned cylinder body side ball groove；Sphere, its have it is multiple, in the cylinder body side ball groove to correspond to each other and axis
Between the ball groove of side, and moment of torsion is transmitted between above-mentioned cylinder block and above-mentioned return plate；And retainer, it is disposed in above-mentioned
Between interior side engagement portion and above-mentioned outer side engagement portion, have to limit shifting of the above-mentioned sphere along the axis direction of above-mentioned central shaft
Dynamic state stores the ball of each sphere；Wherein, so that based on the load that above-mentioned retainer is applied to by each above-mentioned sphere
Turning moment, i.e. around 2 axis that are orthogonal with the axle center of above-mentioned retainer and passing through above-mentioned center of verting turning moment distinguish
The mode of balance, makes the extension axis comprising above-mentioned cylinder body side ball groove all opposite with the cylinder body side channel plane at above-mentioned center of verting
Tilted in the axle center of above-mentioned central shaft, and make the extension axis comprising above-mentioned axis side ball groove and the transmission shaft-side at above-mentioned center of verting
Groove plane is all tilted relative to the axle center of transmission shaft.
According to the present invention, due to make comprising cylinder body side ball groove extension axis and vert center cylinder body side channel plane, with
And the transmission shaft side channel plane at the extension axis comprising axis side ball groove and center of verting, all tilted respectively relative to axle center, institute
So that whole spheres applies load to retainer.Therefore, it is possible to reduce the imbalance for the load for putting on retainer and rotation
The imbalance of torque, suppresses retainer and generates heat with the sliding part of interior side engagement portion or outer side engagement portion, can make pump motor
Rotate high speed.
Brief description of the drawings
Fig. 1 is the sectional view of the inclined shaft type hydraulic pump motor as embodiment of the present invention 1.
Fig. 2 is the main portions expanded view of inclined shaft type hydraulic pump motor as shown in Figure 1.
Fig. 3 is that the decomposition for the structure for representing the constant velocity cardan joint applied to inclined shaft type hydraulic pump motor as shown in Figure 1 is stood
Body figure.
Fig. 4 is the relation between cylinder body side ball groove and axis side ball groove in expansion expression constant velocity cardan joint as shown in Figure 3
Figure.
Fig. 5 is applied to the figure of the retainer of the clino-axis type pump motor as embodiment of the present invention 2, (a) of Fig. 5 for expression
For the side view of the virtual plane P for representing the center by ball；(b) of Fig. 5 is virtual for representing to be set in
The X-axis of plane P and the figure of Y-axis.
Fig. 6 is the relation between cylinder body side ball groove and axis side ball groove in the constant velocity cardan joint of expansion expression embodiment 2
Figure.
Fig. 7 is the sectional view for the variation for representing inclined shaft type hydraulic pump motor.
Symbol description
10 housings
20 transmission shafts
30 cylinder block
30a end faces
30b alignings concave surface
31 shaft mounting holes
32 cylinder bores
40 valve plates
41 slide knuckling face
42 slide prominent cylinder face
60 piston rods
62 supporting parts
70 return plates
71 bar inserting holes
72 e axle supporting holes
80 central shafts
82 e axle supporting heads
100 constant velocity cardan joints
101 axis side ball grooves
101P transmission shaft side channel planes
102 cylinder body side ball grooves
102P cylinder body side channel planes
103 spheres
104 retainers
104a outer surfaces
104b inner surfaces
104c ball
XC verts center
α tilt angles
β1、β2Angle of inclination
γ1、γ2、γ3、γ4、γ5、γ6、γ7Angle of inclination
θ1、θ2、θ3、θ4、θ5、θ6、θ7Angle
Embodiment
Hereinafter, the preferred embodiment of inclined shaft type hydraulic pump motor of the present invention is carried out specifically referring to the drawings
It is bright.
Embodiment 1
Fig. 1 is the figure for the inclined shaft type hydraulic pump motor for being denoted as embodiment of the present invention 1.Here the clino-axis type liquid illustrated
Press pump motor, the walking hydraulic motor of the vehicle used as wheel loader etc. as engineering machinery, it is with housing 10.
Housing 10 has one end for the housing body 11 for being formed as hollow form of opening and to close the shape of the opening of housing body 11
State is installed on the guide plate 12 of the one end of housing body 11, and the hollow internal 11a of housing body 11 is accommodated with transmission shaft 20 and gas
Cylinder body 30.
Transmission shaft 20, has thicker the 2nd bearing supporting of diameter in the one end of the 1st cylindrical bearing support 21
Portion 22, and there is diametrically larger discoideus round plate 23 in the one end of the 2nd bearing support 22.The transmission shaft 20
So that round plate 23 is located at the state of the hollow internal 11a of housing body 11, pass through the 1st bearing support 21 and the 2nd bearing branch
Bearing portion 22 is supported by housing body 11.If further illustrating, the 1st bearing support 21 and housing body 11 of transmission shaft 20
Between be equipped with the 1st taper roll bearing 1, the 2nd circular cone is equipped between the 2nd bearing support 22 and housing body 11 of transmission shaft 20
Roller bearing 2.Transmission shaft 20, can be with the axle center of itself by the 1st taper roll bearing 1 and the 2nd taper roll bearing 2
Rotated centered on 20C relative to housing body 11.
On the round plate 23 of transmission shaft 20, axis incorporating section 23a and multiple bar supporting part 23b is equipped with its end face.Axis is stored
Portion 23a and bar supporting part 23b is the recess for the end face for being opened on round plate 23 respectively.Axis incorporating section 23a is upper in round plate 23
Be formed as only one in the position on the axle center 20C of transmission shaft 20.Bar supporting part 23b does not express in figure, its be arranged at
It is in equally spaced 7 positions each other on common circumference centered on the axle center 20C of transmission shaft 20.
Cylinder block 30 is that to be configured to the section orthogonal with axle center 30C as circular and end face 30a be orthogonal with axle center 30C
Plane columnar part.Shaft mounting hole 31 and multiple cylinder bores 32 are equipped with the cylinder block 30.Shaft mounting hole 31 and cylinder bore 32 are divided
The empty space parallel with the axle center 30C of cylinder block 30 is not created as.These shaft mounting holes 31 and cylinder bore 32 with it is respective
The orthogonal section in axle center is in same circle, and is opened on the end face 30a of cylinder block 30.Shaft mounting hole 31 is positioned at cylinder block
Position on 30 axle center 30C is formed as only one.Cylinder bore 32 is not expressed in figure, it is configured at the axle center of cylinder block 30
On common circumference centered on 30C, it is in equally spaced 7 positions each other to be arranged at.Circumference and transmission shaft equipped with cylinder bore 32
The circumference that bar supporting part 23b is set in 20 round plate 23 is same size.
The other end of the cylinder block 30 is formed with aligning concave surface (end face of the opposing party) 30b.The aligning concave surface of cylinder block 30
30b does not express in figure, it is formed as the dome shape on the extended line of the axle center 30C of cylinder block 30 with center.Intercommunicating pore
33 and multiple interface channels 34 be opened on the aligning concave surface 30b of cylinder block 30.Intercommunicating pore 33 is positioned at the axle center of cylinder block 30
The opening that position on 30C is uniquely set, connects with shaft mounting hole 31.The internal diameter of intercommunicating pore 33 is formed as than shaft mounting hole 31
Internal diameter is small.Interface channel 34 is not expressed in figure, it is opened on the circumference centered on the axle center 30C of cylinder block 30, configuration
In being in equally spaced 7 positions each other.The radius for the circumference that interface channel 34 is open is set as smaller than the circumference that cylinder bore 32 is open
Value.Each interface channel 34 is respectively formed as the internal diameter smaller than cylinder bore 32, and is connected with each cylinder bore 32.
Valve plate 40 is equipped between the aligning concave surface 30b of cylinder block 30 and the guide plate 12 of housing 10.Valve plate 40, which has, to be slided
Knuckling face 41 and the prominent cylinder face 42 of slip, it is slideably abutted by sliding knuckling face 41 with the aligning concave surface 30b of cylinder block 30,
And slideably abutted with the guide surface 12a of guide plate 12 by sliding prominent cylinder face 42.It is to have and cylinder block to slide knuckling face 41
The glomerate part of protrusion of radius of curvature same 30 aligning concave surface 30b, can be with the aligning concave surface 30b with cylinder block 30
The state being close to is slided.It is from relative to the circle for sliding the convex that knuckling face 41 is protruded positioned at the face of opposite side to slide prominent cylinder face 42
Cylinder face.
Dash forward the guide surface 12a of the guide plate 12 that a face 42 abuts with the slip, be configured to slide prominent cylinder face 42 have it is same
The radius of curvature of sample and the concave barrel surface of the length of camber line cylinder face 42 more prominent than slip greatly, are formed at the circle with transmission shaft 20
The opposite position of pan portion 23.The position of the guide surface 12a of the guide plate 12 is set as：Make it is orthogonal with the axle center 20C of transmission shaft 20 and
Line on the end face of round plate 23 becomes the central axis L of cylinder.
In addition, the symbol 50 in Fig. 1 is the actuator for moving the guide surface 12a of valve plate 40 along guide plate 12.Should
In actuator 50, the actuator piston 51 as output element is tiltably engaged by connecting pin 52 with valve plate 40.
Do not express in figure, on the slip knuckling face 41 of valve plate 40, high pressure port and low-pressure port is opened on and cylinder block
30 34 corresponding position of interface channel.These high pressure ports and low-pressure port pass through when cylinder block 30 is rotated around axle center 30C
Interface channel 34 is optionally connected with each cylinder bore 32.More specifically, relative to the axle center 20C comprising transmission shaft 20 and with setting
It is placed in the orthogonal virtual plane of the central axis L of the guide surface 12a of guide plate 12, high pressure port is arranged at side, and low-pressure port
Opposite side is arranged at, the cylinder bore 32 for being configured at the side of virtual plane is connected with high pressure port, is configured at the cylinder bore 32 of opposite side
It is connected with low-pressure port.
On the other hand, in cylinder block 30, piston rod 60 is equipped respectively in cylinder bore 32.Base of the piston rod 60 in bar axle portion 61
End has supporting part 62, on the other hand, has piston portion 63 in the front end of bar axle portion 61, by piston portion 63 slideably
It is inserted into cylinder bore 32.The supporting part 62 of piston rod 60 is configured to have the round plate that can be slidably inserted into and be formed at transmission shaft 20
The outside diameter of 23 bar supporting part 23b it is spherical.Each piston rod 60 has than cylinder block 30 along the direction of axle center 30C respectively
Size length length, piston portion 63 enter cylinder bore 32 it is innermost in the case of, can also maintain supporting part 62 from cylinder block 30
End face 30a be projected into outside state.
The plurality of piston rod 60, the bar supporting for the round plate 23 for being formed at transmission shaft 20 is installed in respective supporting part 62
After portion 23b, by the way that return plate 70 to be fixed on to the end face of round plate 23, to limit each supporting part 62 from the end face of round plate 23
The state of separate mobile tiltably supports the end face of round plate 23.
As shown in Figures 1 and 3, return plate 70 is to be inserted at position corresponding with the bar supporting part 23b of round plate 23 with bar
Through hole 71 and position corresponding with axis incorporating section 23a have e axle supporting hole (outer side engagement portion) 72 disk-like member.Bar
Inserting hole 71 is created as the circular through hole of the internal diameter smaller than the supporting part 62 of piston rod 60.Can be in advance by piston rod
60 are inserted through in the state of bar inserting hole 71 respectively, and return plate 70 is installed on to the end face of round plate 23.E axle supporting hole 72 be by
What the barrel prominent to the axis incorporating section 23a of round plate 23 was penetrated through and formed.It will also realize that from Fig. 2, e axle supporting hole 72, than
The part 72a that plane on 23 end face of round plate is located at axis incorporating section 23a sides is configured to cylindrical.On the other hand, than
The part 72b that plane on 23 end face of round plate is located at 30 side of cylinder block is configured to spherical shape.Further illustrate
Talk about, the part 72b of the spherical shape in e axle supporting hole 72, be the intersection point D of the end face with the axle center 20C of transmission shaft 20 Yu round plate 23
Centered on sphere, be formed towards cylinder block 30 and internal diameter is gradually reduced.
And then as shown in Figures 1 and 2, between cylinder block 30 and the round plate 23 of transmission shaft 20, it is equipped with central shaft
80.Central shaft 80 has the e axle supporting head (inner side of cylindrical axis base portion 81 and the base end part for being arranged at axis base portion 81
Junction surface) 82, it is installed on the consistent state in axle center each other by axis base portion 81 in the shaft mounting hole 31 of cylinder block 30, and lead to
E axle supporting head 82 is crossed to be installed in the e axle supporting hole 72 of return plate 70.
Axis base portion 81 is cylindrical, its outside diameter can be installed in the shaft mounting hole 31 of cylinder block 30 without rocking.Axis
The length of base portion 81 along axis direction is configured to longer than shaft mounting hole 31, so that in the case where being installed on shaft mounting hole 31
One part is projected into outside.On the axis base portion 81, spring reception hole 81a is provided with the position on axle center, and outside
Side face is equipped with key member 83.Spring reception hole 81a is the empty space for the end face for being opened on axis base portion 81.The spring reception hole
The sections of 81a alongst are rounded, are accommodated with by pressing spring 84 inside it.It is helical spring by pressing spring 84, its structure
As outside diameter be slightly less than spring reception hole 81a internal diameter and total length in the non-loaded state than spring reception hole 81a long.Key
Component 83 is the component of rectangular-shape, is mounted to the outer circumferential surface protrusion from axis base portion 81, it is with being arranged in shaft mounting hole 31
The keyway 31a of side face is fitted together to, and plays the function that moment of torsion is transmitted between central shaft 80 and cylinder block 30.
E axle supporting head 82 is in spherical, its outside diameter is smaller than the e axle supporting hole 72 of return plate 70.In e axle supporting head 82 and axis
Between base portion 81, it is provided with for preventing the small diameter part 80a when central shaft 80 is tilted with the interference of 70 phase of return plate.
Being formed between the e axle supporting hole 72 of return plate 70 and the e axle supporting head 82 of central shaft 80 has constant velocity cardan joint 100.
Constant velocity cardan joint 100 transmits moment of torsion by central shaft 80 between transmission shaft 20 and cylinder block 30.In present embodiment 1, in axis
The inner surface of support holes 72 and the outer surface on e axle supporting head 82, in a manner of corresponding to each other respectively formed with multiple ball grooves 101,
102, and sphere 103 is between corresponding each ball groove 101,102, then by e axle supporting hole 72 and e axle supporting head
Retainer 104 is arranged between 82, thus forms constant velocity cardan joint 100.
The ball groove (hereinafter referred to as " axis side ball groove 101 ") in e axle supporting hole 72 and the ball groove on e axle supporting head 82 (it is following, claim
For " cylinder body side ball groove 102 ") it is the groove that cross section is semicircle shape respectively.
As shown in Figures 2 and 3, inner surface opening of the axis side ball groove 101 in e axle supporting hole 72 be extend into it is linear recessed
Groove, and be centered on the intersection point D of the axle center 20C of transmission shaft 20 Yu the end face of round plate 23 along the inner bottom surface of extending direction
The concave surface of arcuation, it is respectively arranged at 7 positions between bar inserting hole 71.These axis side ball grooves 101 positioned at
It is in circumferentially to be arranged side by side equally spaced from each otherly in the plane of the end face of round plate 23.
Outer surface opening of the cylinder body side ball groove 102 on e axle supporting head 82 is to extend into linear groove, and its along
The inner bottom surface of extending direction is the convex surface of the arcuation centered on the ball center 82C on e axle supporting head 82, itself and axis side ball groove 101
It is correspondingly provided with 7.The width of cylinder body side ball groove 102 is of same size with axis side ball groove 101.These cylinder body side ball grooves 102
In the plane of ball center 82C orthogonal with the axle center 80C of central shaft 80 and comprising e axle supporting head 82, circumferentially in each other
Equally spaced it is arranged side by side.
Sphere 103 is in spherical, it has what is configured to be respectively embedded into the state of axis side ball groove 101 and cylinder body side ball groove 102
Outside diameter, arranges one by one between the axis side ball groove 101 and cylinder body side ball groove 102 to correspond to each other.These spheres 103 can be in axis side
Rotate, and can be moved along respective extending direction in ball groove 101 and cylinder body side ball groove 102.
Retainer 104 is endless member, it has and can be supported with the inner surface of the part of spherical shape in e axle supporting hole 72
The outer surface 104a of the dome shape connect and the inner surface with the dome shape that can be abutted with the outer surface on e axle supporting head 82
104b.The outer surface 104a of the spherical shape of retainer 104 and the inner surface 104b of spherical shape are all formed as with retainer 104
Axle center with and the intersection point 104C of the orthogonal bisecting plane in axle center centered on.Therefore, retainer 104 is being disposed in return plate 70
E axle supporting hole 72 and central shaft 80 e axle supporting head 82 between when, with the ball center 82C and transmission shaft on e axle supporting head 82
State consistent with the intersection point D of the end face of round plate 23 20 axle center 20C, cylinder block 30 relative to transmission shaft 20 tiltably with
It is connected.Hereinafter, by the ball center 82C on e axle supporting head 82 consistent with each other and the axle center 20C and disk 23 of transmission shaft 20
The intersection point of end face be known as the center XC that verts.
The retainer 104 is circumferentially equipped with 7 ball 104c.Ball 104c is used for limit sphere 103 along guarantor
The opening of the state storage sphere 103 of the relative movement of the axis direction of holder 104, the edge on the bisecting plane orthogonal with axle center
It is in be arranged side by side equally spaced from each otherly circumferential.The situation of sphere 103 has been respectively configured in the ball 104c of retainer 104
Under, on the bisecting plane orthogonal with the axle center of retainer 104,7 spheres 103 are configured in equally spaced from each other in the circumferential
Position.
As shown on the exploded view of fig. 4, in the walking hydraulic motor, with the extension axis comprising axis side ball groove 101 with inclining
Turn axle center 20C inclined modes of the transmission shaft side channel plane 101P both with respect to transmission shaft 20 of center XC, be provided with axis side ball
Groove 101, and with the extension axis comprising cylinder body side ball groove 102 and vert center XC cylinder body side channel plane 102P both with respect to
The inclined modes of axle center 80C of central shaft 80, are provided with cylinder body side ball groove 102.
If further illustrating, cylinder body side channel plane 102P and transmission shaft side channel plane 101P are in addition to 1 group, in circumferential direction
Upper adjacent plane is respectively relative to axle center 20C, 80C and is tilted in opposite direction.The cylinder body side channel plane 102P to correspond to each other is with passing
Moving axis side channel plane 101P is tilted relative to axle center 20C, 80C in opposite direction.The angle of inclination of cylinder body side channel plane 102P and biography
The angle of inclination of moving axis side channel plane 101P is set as：It is each other identical value, and passing to the angle of inclined
When moving axis 20 and cylinder block 30 are rotated around respective axle center, make from 7 spheres 103 to retainer 104 apply along retainer
104 axial balancing the load.In other words, the angle of inclination of cylinder body side channel plane 102P and transmission shaft side channel plane 101P incline
Rake angle is set as, makes the sum of zero of load axially applied from sphere 103 to retainer 104.For example, 7 cylinders
102 and 7 axis side ball groove 101 of side ball groove, is respectively β with 3 angles of inclination1Cylinder body side channel plane 102P and transmission shaft
Side channel plane 101P and 4 inclined angles are β2(＜ β1) cylinder body side channel plane 102P and transmission shaft side channel plane
101P, and inclination angle beta1And inclination angle beta2It is set as 3 × tan of satisfaction β1=4 × tan β2.If if lifting specific example,
Inclination angle beta1=7 ° 19 ', inclination angle beta2=5 ° 30 '.
Formed as described above in walking hydraulic motor, if to high pressure port fuel feeding on the other hand by low-pressure port with
Fuel tank connects, then piston rod 60 stretches out movement towards transmission shaft 20 successively in the cylinder bore 32 being connected with high pressure port, with low-pressure end
Piston rod 60 retreats movement successively in the cylinder bore 32 of mouth connection, and thus cylinder block 30 rotates, and plays using transmission shaft 20 as output
The function of the walking hydraulic motor of axis.If actuator 50 is driven to change position of the valve plate 40 relative to the guide surface 12a of guide plate 12
Put, then the axle center 30C of cylinder block 30 can change relative to the tilt angle α of the axle center 20C of transmission shaft 20, walking hydraulic motor
Acted with piston rod 60 relative to the state that stroke amount of movement, that is, volume of cylinder bore 32 has been changed.
Here, revolved according to the walking hydraulic motor, transmission shaft 20 with cylinder block 30 by the way that constant velocity cardan joint 100 is synchronous
Turn, therefore the rotating load applied to the slidably contacting section of piston rod 60 and cylinder block 30 can be mitigated, do not have in work
The problems such as slidably contacting section of stopper rod 60 and cylinder block 30 triggers seizing or sintering.
Also, axis side ball groove 101 and cylinder body side ball groove 102 are in the arcuation centered on the center XC that verts, and be in
In retainer 104 between the e axle supporting hole 72 of return plate 70 and the e axle supporting head 82 of central shaft 80, the appearance of spherical shape
The inner surface 104b of face 104a and spherical shape with the axle center of retainer 104 with and the orthogonal bisecting plane in axle center intersection point
Formed centered on (vert center XC).Therefore, unnecessary turning moment is not had when cylinder block 30 rotates acts on gas
Cylinder body 30.
And then in a manner of making to be applied to the balancing the load on axis direction of retainer 104 by each sphere 103,
Make the cylinder body side channel plane 102P of the extension axis comprising cylinder body side ball groove 102 and the center XC that verts and comprising axis side ball groove
The transmission shaft side channel plane 101P of 101 extension axis and the center XC that verts, is all respectively relative to axle center 20C, 80C and tilts.
As a result, whole spheres 103 are balanced with applying the state of load to retainer 104 on axis direction.Therefore, it is possible to reduce
Put on the imbalance of the load on retainer 104.
As a result, to the aligning concave surface 30b of cylinder block 30, only abut the slip knuckling face 41 of valve plate 40, then pass through that
This aligning effect is always able to maintain that the state of sliding contact between cylinder block 30 and valve plate 40 without causing position offset.
Thus, between cylinder block 30 and valve plate 40 will not deflection, the rotation high speed of cylinder block 30 can be made.
Embodiment 2
In the above embodiment 1, by the angle of inclination of cylinder body side channel plane 102P and transmission shaft side channel plane 101P
Angle of inclination is set as：Be identical value each other to the angle of inclined, and transmission shaft 20 and cylinder block 30 around
During its respective axle center rotation, make to put down along the axial load of retainer 104 from 7 spheres 103 to what retainer 104 applied
Weighing apparatus.However, cylinder body side channel plane 102P angle of inclination and transmission shaft side channel plane 101P angle of inclination setting method simultaneously
It may be not necessarily limited to this.
For example, it is also possible to so that the turning moment based on the load that retainer 104 is applied to by each sphere 103, i.e. around
By way of the turning moment of 2 axis orthogonal with the axle center of retainer 104 and the center XC that verts balances respectively, cylinder body is set
The angle of inclination of side channel plane 102P and the angle of inclination of transmission shaft side channel plane 101P.Hereinafter, it is appropriate with reference to Fig. 5 and Fig. 6, it is right
The setting method at the angle of inclination provided by the embodiment 2 illustrates.Further, since what is illustrated in embodiment 2 is oblique
The structure of shaft type hydraulic pump motor is identical with embodiment 1, therefore it is carried out respectively in detail using same symbol and omission
Explanation.
As shown in (a) of Fig. 5 and (b) of Fig. 5, for retainer 104, setting is orthogonal with axle center and is passing through ball 104c
Center imaginary plane P in orthogonal X-axis and Y-axis.X-axis and Y-axis can be set in optional position.Below for ease of saying
It is bright, using Y-axis as starting point, by sequentially assigning identification number clockwise in (b) of Fig. 5.If each ball 104c will be played from Y-axis
The angle at center be set to θ1、θ2、θ3、θ4、θ5、θ6And θ7, by the angle of inclination of cylinder body side channel plane 102P and biography
The angle of inclination of moving axis side channel plane 101P is set to γ1、γ2、γ3、γ4、γ5、γ6And γ7, and by the axis of cylinder block 30
Heart 30C is set to α relative to the tilt angle of the axle center 20C of transmission shaft 20, then under the equilibrium equation around the turning moment of X-axis is
Formula 1, the equilibrium equation around the turning moment of Y-axis are following formula 2.
Cylinder body side channel plane 102P and transmission shaft side channel plane 101P are in addition to 1 group, and adjacent plane is distinguished in the circumferential
Relative to axle center 20C, 80C this point, and the cylinder body side channel plane 102P and transmission shaft-side to correspond to each other are tilted in opposite direction
Groove plane 101P tilts this point relative to axle center 20C, 80C in opposite direction, identical with embodiment 1.
By angle of inclination γ1、γ2、γ3、γ4、γ5、γ6And γ7It is set as meeting above-mentioned formula 1 and formula 2, then can makes base
Put down respectively in the turning moment around X-axis for the load that retainer 104 is applied to by 7 spheres 103 and the turning moment around Y-axis
Weighing apparatus.Also, due to make the extension axis comprising cylinder body side ball groove 102 and the center XC that verts cylinder body side channel plane 102P and
The transmission shaft side channel plane 101P of extension axis comprising axis side ball groove 101 and the center XC that verts, is all respectively relative to axle center
20C, 80C are tilted, therefore apply the state of load to retainer 104 as whole spheres 103.Betided therefore, it is possible to reduce
The imbalance of the turning moment of retainer 104.
As a result, to the aligning concave surface 30b of cylinder block 30, only abut the slip knuckling face 41 of valve plate 40, then pass through that
This aligning effect is always able to maintain that the state of sliding contact between cylinder block 30 and valve plate 40 without causing position offset.
Thus, between cylinder block 30 and valve plate 40 will not deflection, the rotation high speed of cylinder block 30 can be made.
In addition, in embodiment 2, if by angle of inclination γ1、γ2、γ3、γ4、γ5、γ6And γ7It is set as except satisfaction
Outside equation 1 above and formula 2, also meet following formula 3, then can make the axis along retainer 104 that retainer 104 is applied to by 7 spheres 103
To balancing the load, the fever produced by the resistance to sliding of retainer 104 and return plate 70 and central shaft 80 can be suppressed.
In addition, in the above embodiment 1 and embodiment 2, exemplified with walking hydraulic motor, but can also apply
The hydraulic motor of purposes beyond walking.And then its former state can also be applied and be pumped for inclined shaft type hydraulic.In addition, form above
Can change relative to the tilt angle α of transmission shaft 20 for cylinder block 30, but and need not necessarily be configured to tilt angle can
Change.
And then in the above embodiment 1 and embodiment 2, will be divided formed with shaft mounting hole 31 in cylinder block 30
The central shaft 80 that body is formed is installed on shaft mounting hole 31, but and need not be necessarily separately formed by cylinder block 30 and central shaft 80.
In addition, in the case that cylinder block 30 and central shaft 80 is separately formed, variation as shown in Figure 7 is such, can also be by
Mandrel 80 is configured to interior axle 180 and outer ring 280.According to the variation, if the portion thicker as the application diameter of outer ring 280
Part, then need not use the thicker component of diameter as interior axle 180, it becomes possible to using outer diameter it is big press pressing spring 184.
In addition, in the above embodiment 1 and embodiment 2,7 cylinder bores 32 are provided with exemplified with cylinder block 30, but
As long as the number beyond odd number or 7, such as 9 etc..In the inclined shaft type hydraulic pump motor for having 9 cylinder bores 32
In the case of, in order to prevent from fluctuating when transmitting moment of torsion, it is respectively 9, or 3 to make the number of cylinder body side ball groove 102 and axis side ball groove 101
Road.In addition, the cylinder body side channel plane 102P and transmission shaft side channel plane 101P of embodiment 1 are formed as：Relative to axle center 20C,
The angle of inclination of 80C to the inclined plane in side is equal to each other, and relative to axle center 20C, 80C to the inclined plane of opposite side
Angle of inclination is equal to each other, therefore can more reduce the imbalance for the load for putting on retainer 104.As long as however, cylinder body
Side channel plane 102P and transmission shaft side channel plane 101P is all tilted, and just it's not limited to that, such as can also be all with difference
Inclined at inclination angles.
And then in the above embodiment 1 and embodiment 2, cylinder block 30 is provided with aligning concave surface 30b, and in valve plate 40
Formed with slip knuckling face 41, and the two is mutually slided, but cylinder block 30 and valve plate 40 can also be made to be slided each other by plane
It is dynamic.
Claims (7)
1. a kind of inclined shaft type hydraulic pump motor, it is that have：Cylinder block, it has center in the position in the axle center in a square end face
Axis, and the circumference upper shed in the party end face centered on the axle center has odd number cylinder bore；Return plate, it is by institute
Central shaft is stated tiltably to be supported on the end face of transmission shaft；And constant velocity cardan joint, it is by the central shaft and the backhaul
Connected between disk, by the constant velocity cardan joint, when the transmission shaft and the cylinder block are rotated centered on respective axle center,
It is disposed in the piston rod of the cylinder bore being rushed around the angle of inclination at center of verting according to the transmission shaft and the cylinder block
The inclined shaft type hydraulic pump motor of Cheng Yidong, it is characterised in that
The constant velocity cardan joint has：
Interior side engagement portion, it is formed at the supporting end of the central shaft, outer surface along using the axle center of the central shaft as
The cylinder body side ball groove of number corresponding with the cylinder bore is arranged side by side in the circumferential direction at center；
Outer side engagement portion, it is formed at position opposite with the supporting end of the central shaft in the return plate, in inner surface
Axis side ball corresponding with cylinder body side ball groove has been arranged side by side along the circumferential direction centered on the axle center of the transmission shaft
Groove；
Sphere, its have it is multiple, between the cylinder body side ball groove and axis side ball groove to correspond to each other, in the cylinder block and described time
Moment of torsion is transmitted between journey disk；And
Retainer, it is disposed between the interior side engagement portion and the outer side engagement portion, have with limit the sphere along
The state of the movement of the axis direction of the central shaft stores the ball of each sphere；Wherein,
In a manner of making to be applied to the balancing the load on axis direction of the retainer by each sphere, make to include institute
The extension axis of cylinder body side ball groove and the cylinder body side channel plane at the center of verting are stated all relative to the axle center of the central shaft
Tilt, and make the transmission shaft side channel plane at the extension axis comprising axis side ball groove and the center of verting all relative to biography
The axle center of moving axis tilts.
2. inclined shaft type hydraulic pump motor as claimed in claim 1, it is characterised in that the cylinder body side channel plane and the transmission
For axis side channel plane in addition to 1 group, adjacent both are respectively relative to axle center in opposite direction inclination in the circumferential, also, right each other
The cylinder body side channel plane answered is tilted with transmission shaft side channel plane relative to axle center in opposite direction.
3. inclined shaft type hydraulic pump motor as claimed in claim 2, it is characterised in that the cylinder body side channel plane and the transmission
Axis side channel plane relative to angle of inclination of the axle center to the inclined plane in side to be equal to each other and relative to axle center to another
The mode that the angle of inclination of the inclined plane in side is equal to each other is formed.
4. inclined shaft type hydraulic pump motor as claimed in claim 1, it is characterised in that the outer surface of the interior side engagement portion and
The inner surface of the outer side engagement portion is respectively structured as spherical centered on the center of verting, and makes cylinder body side ball
The center of curvature of the center of curvature of groove and axis side ball groove is consistent with the center of verting.
5. inclined shaft type hydraulic pump motor as claimed in claim 1, it is characterised in that the central shaft and the cylinder block split
Formed, and in the cylinder block formed with shaft mounting hole, described in the state general protruded with supporting end from the party end face
Central shaft is installed in the shaft mounting hole.
6. inclined shaft type hydraulic pump motor as claimed in claim 1, it is characterised in that have：
Valve plate, it is between the opposing party end face of the cylinder block and housing, relative to the cylinder block rotatably with its
Sliding contact, the switching control of the pressure to each cylinder bore is carried out thus according to the rotation position of the cylinder block；Wherein,
The valve plate is supported by having the sphere at center on the axes extending line of the cylinder block with the opposing party end face
Connect.
7. a kind of inclined shaft type hydraulic pump motor, it is that have：Cylinder block, it has center in the position in the axle center in a square end face
Axis, and the circumference upper shed in the party end face centered on the axle center has odd number cylinder bore；Return plate, it is by institute
Central shaft is stated tiltably to be supported on the end face of transmission shaft；And constant velocity cardan joint, it is by the central shaft and the backhaul
Connected between disk, by the constant velocity cardan joint, when the transmission shaft and the cylinder block are rotated centered on respective axle center,
It is disposed in the piston rod of the cylinder bore being rushed around the angle of inclination at center of verting according to the transmission shaft and the cylinder block
The inclined shaft type hydraulic pump motor of Cheng Yidong, it is characterised in that
The constant velocity cardan joint has：
Interior side engagement portion, it is formed at the supporting end of the central shaft, outer surface along using the axle center of the central shaft as
The cylinder body side ball groove of number corresponding with the cylinder bore is arranged side by side in the circumferential direction at center；
Outer side engagement portion, it is formed at position opposite with the supporting end of the central shaft in the return plate, in inner surface
Axis side ball corresponding with cylinder body side ball groove has been arranged side by side along the circumferential direction centered on the axle center of the transmission shaft
Groove；
Sphere, its have it is multiple, between the cylinder body side ball groove and axis side ball groove to correspond to each other, in the cylinder block and described time
Moment of torsion is transmitted between journey disk；And
Retainer, it is disposed between the interior side engagement portion and the outer side engagement portion, have with limit the sphere along
The state of the movement of the axis direction of the central shaft stores the ball of each sphere；Wherein,
So that the turning moment based on the load that the retainer is applied to by each sphere, i.e. around with the retainer
Axle center is orthogonal and by way of the turning moment of 2 axis the center of verting balances respectively, makes to include the cylinder body side
The extension axis of ball groove is all tilted with the cylinder body side channel plane at the center of verting relative to the axle center of the central shaft, and is made
The transmission shaft side channel plane at the extension axis comprising axis side ball groove and the center of verting is all relative to the axis of transmission shaft
The heart tilts.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/077846 WO2017056272A1 (en) | 2015-09-30 | 2015-09-30 | Inclined shaft type hydraulic pump motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108026894A true CN108026894A (en) | 2018-05-11 |
| CN108026894B CN108026894B (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580083120.5A Active CN108026894B (en) | 2015-09-30 | 2015-09-30 | Inclined shaft type hydraulic pump motor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10612530B2 (en) |
| JP (1) | JP6514351B2 (en) |
| CN (1) | CN108026894B (en) |
| DE (1) | DE112015006808T5 (en) |
| WO (1) | WO2017056272A1 (en) |
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| CN113027669A (en) * | 2021-05-01 | 2021-06-25 | 金乡县恒海液压机械有限公司 | Spherical pair of output shaft spherical recess of inclined shaft type plunger motor and plunger ball head and manufacturing method thereof |
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2015
- 2015-09-30 US US15/756,228 patent/US10612530B2/en active Active
- 2015-09-30 JP JP2017542626A patent/JP6514351B2/en active Active
- 2015-09-30 CN CN201580083120.5A patent/CN108026894B/en active Active
- 2015-09-30 WO PCT/JP2015/077846 patent/WO2017056272A1/en active Application Filing
- 2015-09-30 DE DE112015006808.2T patent/DE112015006808T5/en active Pending
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| JP2001241376A (en) * | 2000-02-29 | 2001-09-07 | Shimadzu Corp | Inclined shaft type variable displacement piston pump or motor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108026894B (en) | 2019-07-12 |
| WO2017056272A1 (en) | 2017-04-06 |
| JP6514351B2 (en) | 2019-05-15 |
| JPWO2017056272A1 (en) | 2018-07-19 |
| US10612530B2 (en) | 2020-04-07 |
| DE112015006808T5 (en) | 2018-05-24 |
| US20180252271A1 (en) | 2018-09-06 |
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